1997 MITSUBISHI TRITON Workshop Manual

MPI ± Troubleshooting13A-62
ACTUATOR TEST REFERENCE TABLE13100900210
Item
No.Inspection
itemDrive contentsInspection contentsNormal conditionInspection
procedure
No.Reference
page
01InjectorsCut fuel to No.1,
No.3 injectorEngine:
After having warmed up/En-
gine is idling
(Cut the fuel supply to each
Idling condition
becomes different
(becomes unsta-
ble)
Code No.
4113A-19
02Cut fuel to No.2,
No.4 injector(Cut the fuel supply to each
injector in turn and check
cylinders which don't affect
idling.)
ble).
07Fuel pumpFuel pump
operates and
fuel is recircu-
lated.
Engine:
Cranking

Fuel
pump:
Forced
driving
Inspect
accord-
Pinch the
return hose
with fingers
to feel the
pulse of the
fuel being
recirculated.Pulse is felt.Procedure
No. 2413A-40
accord-
ing to
both the
above
condi-
tions.
Listen near
the fuel tank
for the
sound of fuel
pump
operation.Sound of operation
is heard.
08Purge
control
solenoid
valveSolenoid valve
turns from OFF
to ON.Ignition switch: ONSound of operation
can be heard when
solenoid valve is
driven.Procedure
No. 3213A-45
10EGR
control
solenoid
valveSolenoid valve
turns from OFF
to ON.Ignition switch: ONSound of operation
can be heard when
solenoid valve is
driven.Procedure
No. 3313A-46

C
heck it e m C
heck c o ndit io n ( E ngin e c o ndit io n) N
orm al c o ndit io n 1 N
o.1 , N o.3 in je cto r W
hile e ngin e is id lin g a fte r h avin g w
arm ed u s
u ddenly de r
e ss th e F
ro m 1 1 ± 14 V , m om enta rily d
ro s
slig htly 1
4 N
o.2 , N o.4 in je cto r w
arm ed u s
u ddenly d
e re ss t
h e d
ro s s
lig htly 4 S
te pper m oto r c o il < A 1> E
ngin e: S oon a fte r th e w arm ed u p e
ngin e is sta rte d S
yste m v o lt a ge e 0 ± 3 V (
C hanges re e
ate dly ) 1
7 S
te pper m oto r c o il < A 2> e
ngin e i
s s
ta rte d (
C hanges r
e eate dly ) 5 S
te pper m oto r c o il < B 1> 1
8 S
te pper m oto r c o il < B 2> 6 E
G R c o ntr o l s o le noid v
a lv e I
g nit io n s w it c h : O N S
yste m V olt a ge v
a lv e W
hile e ngin e is id lin g, s u ddenly d epre ss
t h e a cce le ra to r p edal. F
ro m s yste m v o lt a ge,
m om enta rily d ro ps 8
o r 2 2* F
uel p um p r e la y I
g nit io n s w it c h : O N S
yste m v o lt a ge E
ngin e: Id le s p eed 0
± 3V 9 P
urg e c o ntr o l s o le noid v
a lv e I
g nit io n s w it c h : O N S
yste m v o lt a ge v
a lv e R
unnin g a t 3 ,0 00r/m in w hile e ngin e is
w arm in g u p a fte r h avin g b een s ta rte d. 0
± 3V 1
0 P
ow er tr a nsis to r u nit E
ngin e r /m in : 3 ,0 00 r /m in 0
.3 ± 3.0 V 1
2 P
ow er s u pply I
g nit io n s w it c h : O N S
yste m v o lt a ge 2
5 1
9 A
ir flo w s e nso r r e se t s
ig nal E
ngin e: Id le s p eed 0
± 1V s
ig nal E
ngin e r /m in : 3 ,0 00 r /m in 6
± 9V 2
2 o r 8 * A
/C r e la y S
yste m v o lt a ge o r
m om enta rily
6 V o r m ore
0 ± 3V 3
4 I
g nit io n tim in g a dju st-
m ent te rm in al I
g nit io n s w it c h : O N E
arth th e ig nit io n
t im in g a dju stm ent
t e rm in al 0
± 1 V R
em ove th e e arth
f r o m th e ig nit io n
t im in g a dju stm ent
t e rm in al 4
.0 ± 5 .5 V

MPI ± Troubleshooting13A-65
Terminal No.Normal condition Check condition (Engine condition) Check item
35Oxygen sensor heaterEngine: Idling after warming up0±3V
Engine r/min: 5,000r/min.System voltage
36Engine warning lampIgnition switch: OFF
ON0 ± 3V
9 ± 13V
(After several seconds have
elapsed)
37Power steering fluid
pressure switchEngine: Idling after
warming upWhen steering
wheel is stationarySystem voltage
When steering
wheel is turned0±3V
38Control relay
(Power supply)
Ignition switch: OFFSystem voltage
(Power su ly)
Ignition switch: ON0±3V
45A/C switchEngine: Idle speedTurn the A/C
switch OFF0±3V
Turn the A/C
switch ON (A/C
compressor is
operating)System voltage
51Ignition switch ± STEngine: Cranking8V or more
52Intake air temperature
sensorIgnition switch:
ONWhen intake air
temperature is
0
C3.2 ± 3.8V
When intake air
temperature is
20
C2.3 ± 2.9V
When intake air
temperature is
40
C1.5 ± 2.1V
When intake air
temperature is
80
C0.4 ± 1.0V
56Oxygen sensorEngine: Running at 2,500 r/min after
warmed up (Check using a digital type
voltmeter)0
0.8V
(Changes repeatedly)
60Backup power supplyIgnition switch: OFFSystem voltage
61Sensor impressed
voltageIgnition switch: ON4.5 ± 5.5V
62Ignition switch ± IGIgnition switch: ONSystem voltage

MPI ± TroubleshootingMPI ± Troubleshooting13A-66
Terminal No.Normal condition Check condition (Engine condition) Check item
63Engine coolant
temperature sensorIgnition switch:
ONWhen engine
coolant tempera-
ture is 0C3.2 ± 3.8V
When engine
coolant tempera-
ture is 20C2.3 ± 2.9V
When engine
coolant tempera-
ture is 40C1.3 ± 1.9V
When engine
coolant tempera-
ture is 80C0.3 ± 0.9V
64Throttle position
sensorIgnition switch:
ONSet throttle valve
to idle position0.3 ± 1.0V
Fully open throttle
valve4.5 ± 5.5V
65Barometric pressure
sensorIgnition switch:
ONWhen altitude is
0m3.7 ± 4.3V
When altitude is
1,200m3.2 ± 3.8V
66Vehicle speed sensor
Ignition switch: ON

Move the vehicle slowly forward0
5V
(Changes repeatedly)
67Idle position switchIgnition switch:
ONSet throttle valve
to idle position0±1V
Slightly open
throttle valve4V or more
68Top dead centre sensorEngine: Cranking0.4 ± 3.0V
Engine: Idle speed0.5 ± 2.0V
69Crank angle sensorEngine: Cranking0.4 ± 4.0V
Engine: Idle speed1.5 ± 2.5V
70Air flow sensorEngine: Idle speed2.2 ± 3.2V
Engine r/min: 2,500r/min
71Inhibitor switch Ignition switch:
ONSet selector lever
to P or N0±3V
Set selector lever
to Other than P or
N8 ± 14V

I
n sp ectio n it e m N
orm al c o ndit io n ( C heck c o ndit io n) 1
± 12 N
o.1 , N o.3 in je cto r 6
.5 ± 8 .0 W ( A t 2 0
C ) 1
4 ± 12 N
o.2 , N o.4 in je cto r

MPI ± Troubleshooting13A-68
Terminal No. Normal condition (Check condition)Inspection item
4±12Stepper motor coil (A1)28 ± 33 W (At 20
C)
17 ± 12Stepper motor coil (A2)
5±12Stepper motor coil (B1)
18 ± 12Stepper motor coil (B2)
6±12EGR control solenoid valve36 ± 44 W (At 20
C)
9±12Purge control solenoid valve36 ± 44 W (At 20
C)
13 ± Body earthEngine-ECU earthContinuity (0W)
26 ±Body earthEngine-ECU earth
35 ± 12Oxygen sensor heaterApprox. 12 W (At 20
C)
52 ± 72Intake air temperature sensor5.3 ± 6.7 kW (When intake air temperature is 0
C)
2.3 ± 3.0 kW (When intake air temperature is 20
C)
1.0 ± 1.5 kW (When intake air temperature is 40
C)
0.30 ± 0.42 kW (When intake air temperature is 80
C)
63 ± 72Engine coolant temperature sensor5.1 ± 6.5 kW (When coolant temperature is 0
C)
2.1 ± 2.7 kW (When coolant temperature is 20
C)
0.9 ± 1.3 kW (When coolant temperature is 40
C)
0.26 ± 0.36 kW (When coolant temperature is 80
C)
67 ± 72Idle position switchContinuity (when throttle valve is at idle position)
No continuity (when throttle valve is slightly open)
71 ±Body earthInhibitor switch Continuity (when select lever is at P or N)
No continuity (when select lever is at D, 2, L or R)

S
pecia l p atte rn s P
atte rn h eig ht L
ow P
atte rn s e le cto r D
is p la y E
ngin e r /m in I
d le s p eed